Curiosity. I'm surprised 47% had valid SSN. Of the 53% how many were invalid and how many were mis-matched? A mismatched SSN can be one of two types
1) The immigrant or his ID provider took a random number that just happened to belong to someone else.
2) The immigrant used the valid SSN of his spouse, child, cousin or other acquaintance.
Note that a SSN purchased by an illegal from an employee of the Social Security Dept is a valid SSN. Dem patronage has sold a lot of them in Chicago. How common it is in other areas I do not know.
I just like to know these little trivia points.
I saw a few ICE press releases (and posted them here) where some corrupt law firms were setting up illegals with close to valid paperwork work (IDs).